Purely fantasy for me! I am not involved in the BDSM scene, so can't relate to the whole master/slave dynamic where a guy would actually want to be "un-manned" as a symbolic gesture of ultimate submission.

Reading Freudian theory I came across Paglia and the myth of the toothed vagina, which really frightened the shit out of me on some *********** level. The film Teeth exacerbated this somewhat to say the least, and my "fear" became eroticised - perhaps a defence mechanism against the psychological trauma that movie caused, haha...

The idea of triumphant penetration followed by a CHOMP and the subsequent emasculation....the look on her face particularly, and shortly after, the look on the faces of the all-female medical team entrusted to salvage the remnants....

"Threat play" would be the closest I'd desire. So far, its not something I've requested from a girlfriend - I don't think I could look her in the eye again!